quadmasta t1_ja5cww8 wrote
Reply to comment by KaareKanin in ELI5: Why does farming equipment require such low horsepower compared to your average car? by thetravelingsong
Horsepower is the product of torque and rotational speed divided by 5252. If you're not spinning quickly, and diesels can't, you gotta have way more torque to produce higher horsepower.
Ever see a dyno graph for a combustion engine?
KaareKanin t1_ja6ucmc wrote
But on the flip side, gear down a normal car engine to output the same rpm, and the torque would be higher (with the premise that a car engine has more power).
Cars don't require much power, only the drivers do. Power is king, torque is just a matter of gearing
quadmasta t1_ja7h7mc wrote
No it wouldn't. Gasoline vehicle engines are designed for higher RPMs and don't make peak power until higher up in their operating range. Tractor engines are designed for low RPM operation and have their peak power waaaaay down in the RPM range.
KaareKanin t1_ja7krne wrote
A given power figure on a shaft rotating at given speed will give the same torque. This is how it works. You can't really argue with this. So I say again, gear both drivetrains to the same output speed, and the one with more power has more torque
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